Material handling device for tractor mounted loaders



.1. S. PILCH Oct. 30, 1956 MATERIAL HANDLING DEVICE FOR TRACTOR MOUNTED LOADERS 3 Sheets-Sheet 1 Filed Feb. 21, 1955 INVENTOR JOHN S 'Pl LCH BY 7m; AT OPNEK J. S. PILCH Oct. 30, 1956 MATERIAL HANDLING DEVICE FOR TRACTOR MOUNTED LOADERS Filed Feb. 21, 1955 I 3 Sheets-Sheet 2 INVENTOR. JOH N S 'Pl LC H ATTOP/VEK J. S. PILCH Oct. 30, 1956 MATERIAL HANDLING DEVICE FOR TRACTOR MOUNTED LOADERS Filed Feb. 21, 1955 3 Sheets-Sheet 3 MATERIAL HANDLING DEVICE FOR TRACTOR MOUNTED LOADERS John S. Pilch, Ware, Mass.

Application February 21, 1955, Serial No. 489,582

4 Claims. (Cl. 214-510) This invention relates to material handling apparatus and has particular reference to a new and improved material pushing or pulling member which may be utilized alone for grading or the like, or which maybe mounted on a loader whereupon it may be employed for forcing or pulling material into the loader bucket.

An object of the invention is to provide a new and improved means for forcing material into the bucket of a tractor mounted loader or the like.

Another object is to provide an apparatus of the type set forth which has a hoeing or raking action whereby the loader bucket can be filled before dumping.

Another object is to provide an apparatus of the type set forth which is relatively simple and economical in construction and efiicient in operation.

Another object of the invention is to provide a new and improved apparatus of the type set forth wherein means is provided for controlling the hoeing or raking action.

Other objects and advantages of the invention will be apparent from the following description taken in connection with the accompanying drawings. It will be understood that changes may be made in the details of construction and arrangement of parts without departing from the spirit of the invention as set forth in the accompanying claims, as the preferred form has been given by way of illustration only.

Referring to the drawings:

Fig. 1 is a side view of a tractor mounted loader embodying the invention;

Fig. 2 is a fragmentary side view generally similar to Fig. 1, but illustrating a step in the operation of the device;

Fig. 3 is a top or plan view of the apparatus shown in Figs. 1 and 2;

Fig. 4 is a side view generally similar to Fig. 1, but illustrating another step in the operation of the device;

Fig. 5 is a fragmentary view taken on line 5-5 of Fig. 4, looking in the direction of the arrows;

Fig. 6 is a top or plan view of the arrangement shown in Fig. 5; and

Fig. 7 is a sectional view taken on line 77 of Fig. 5, looking in the direction of the arrows.

Referring more particularly to the drawings wherein similar reference characters designate corresponding parts throughout the several views, the apparatus has been shown embodied in a tractor mounted loader, for the purpose of illustration, and it is understood that the invention may be embodied in other forms of apparatus also.

In the arrangement shown, the tractor comprises the frame 10, wheels 11 and operators seat 12.

On each side of the tractor and secured to the frame is provided an upright support 13 and adjacent the upper ends of each of the supports 13 is pivotally connected a loader or push arm 14 which may be straight although, preferably, has the downwardly depending portion 14a and to the free or forward ends of the push arm is pivotally connected the bucket 15 at 16.

States Patent 0 ice The hydraulic jacks 17 are provided, one for each push arm, for raising and lowering the push arms and thereby raising and lowering bucket 15 accordingly. The jacks 17 are each pivotally connected adjacent one end 18 to one of the upright supports 13 and the opposite end of jacks 17 are pivotally connected at 19 to lug 20 on the push arm, although the jacks 17 could be directly connected to the push arm, if desired.

The bucket rotating mechanism comprises .a hydraulic jack 21 connected to each of the push arms or to lugs on the push arms, at one end, and have their opposite ends pivotally connected at 22 to bucket 15. As shown, jack 21 can rotate bucket 15 into loading position as shown in Fig. l or to dumping position as shown in broken lines in Fig. 4. Also if desired, linkage may be employed by the hydraulic jack 21 and bucket 15 or the jacks can be connected directly to the bucket as shown.

The bucket 15 is provided with a lip 15a adjacent its upper edge in order to prevent the escape of material from the bucket and also to prevent material from being pushed over the bucket during the loading of the bucket as hereinafter described. This lip 15a may be formed integral with the bucket 15 or formed separate and secured thereto, if desired.

In order to draw material into the loader bucket 15, there is provided a hoe or rake member consisting of a blade 23 although tines could be employed depending upon the material to be loaded and this blade 23 is connected to arms .24 which extend through telescoping members 25 supported on each of the push arms. The telescoping members 25 can be connected directly to the push arms or to the lugs 21) which in turn are secured to the push arms as shown. A pair of arms 24, that is, one for each of the push arms, may be employed or a single arm member 24 may be employed in which event said arm member would preferably be positioned centrally relatively of the blade 23. The number of telescoping members 25 would, of course, depend upon the number of arms 24 and one of said members 25 is provided for each of said arms. If desired, more than two of said arms 24 could be provided.

Secured to the lower side of each of the telescoping members 25 is a stop member 26 having the stops or ears 27 for limiting the upward and downward movement of telescoping members 25 and arms '24.

For actuating the arm members 24 and thereby actuating blade 23, there is provided one or more hydraulic jacks 28 which are connected at one end either to the push arms or to lugs 20 on the push arms and at their opposite ends are pivotally connected at 29 to lugs or arms 24 either directly or through linkage interposed between said lugs 29 and hydraulic jacks 23.

The telescoping members 25 are each preferably provided with a friction arrangement for controlling the raising or lifting of arms 24 and blade 23 before said arms and blade are pushed outwardly by hydraulic jack 28. This friction arrangement can comprise a friction nut arrangement including packing 30 on the inside of telescoping member 25 and nut 31 for adjusting the tension on the packing for controlling the movement of the arms 24 as previously described.

The inner ends of arms 24 are provided with stops 32 for limiting the outward movement of the arms 24 and blade 23.

In operation, the push arms are lowered until the bucket reaches the ground and the bucket is rotated to the loading position as shown in Fig. l by means of hydraulic jack 21.

By means of hydraulic jacks 28, the arms 24 may then be moved outwardly to move blade 23 to a loading position and then by retraction of jacks 28 the blade 23 forces the material to be loaded into bucket 15.

It will be seen that by controlling the friction between arms 24 and telescoping members 25 that it is possible to control the lift of arms 24 and blade 23 by jacks 28 before said arms and blade are moved outwardly and this can be controlled depending on the type or size of material to be loaded.

After the bucket is filled, the mechanism is raised by raising the push arms through the jacks 17 and then by rotating the bucket by means of jack 21 to the dumping position shown in broken lines in Fig. 4 and the material can be dumped.

It will be seen from the foregoing that the action of the arms 24 and blade 23 is, in fact, a raking or hoeing action with the amount of lift of the arms and blade being controlled by the friction or tension between the arms and the telescoping members 25 and with the stroke of the arms and blade being controlled by jacks 28 while the upward or downward tilting motion of the telescoping member 25 is controlled through stops 27, as previously described, to restrain such tilting or pivoting within desired limits.

It will be seen that by merely adjusting nuts 31 that it is possible to adjust the tension or friction between arms 24 and telescoping members 25 and thereby adjust the lifting action of the arms and blade during the raking or hoeing action thereof.

It will be seen that the hydraulic jack 28, in addition to raising and moving the member 23 upwardly and outwardly, also serves to pull said member downwardly and toward the arms 14 and, therefore, the apparatus may be used for scraping and pulling in such as, for example, scraping surfaces which may be hard.

It will also be seen that instead of using the pair of jacks 28 that a single jack could be employed. Further, that with the present apparatus, the jacks 28 serve both to move the arms 24 and blade 23 upwardly as well as forwardly, also, if desired, separate lift jacks could be employed by the push arms 14 and arms 24.

It will also be seen that if the friction or the friction nut is removed, that jacks 28 first move arms 24 and blades 23 outwardly substantially the full extent of their motion before effecting lifting action thereof whereas with the friction, the jacks 28 serve to raise arms 24 and blade 23 first and then move them outwardly. With a friction device such as that shown, motion or action of the member may be controlled, as desired, within the limits allowed by the stops 27.

It is also pointed out that instead of being employed in conjunction with a loader bucket as shown, that the arms 24 and member 23 could be mounted on a support and used without the buckets or push arms for grading or similar purposes.

From the foregoing, it will be seen that I have provided new and improved means for obtaining all of the objects and advantages of the invention.

I claim:

1. In a device of the character described, a pair of spaced supports, a pair of push arms pivotally connected relative to said supports, a bucket carried by said push arms, a member for pulling material into said bucket, supporting arms connected to said member and to said push arms and hydraulic means for actuating said pulling memher, and sleeve members carried by said push arms for receiving said supporting arms for pivotally supporting said supporting arms relative to said push arms and friction means for controlling the movement of said supporting arms in said sleeve members whereby movement of said arms by said hydraulic means will effect raking action by said puller member.

2. In a device of the character described, a pair of spaced supports, a push arm pivotally connected to each of said supports, a bucket carried by said push arms, a puller member for pulling material into said bucket, arm means for actuating said pulling means, sleeve means adapted to receive said arm means said sleeve means being pivotally mounted relative to said push arms and hydraulic means connected to said push arms and said arm means for actuating said arm means and thereby actuate said pulling means and stop means for controlling the raising of said sleeve means relative to said push arms whereby movement of said arms by said hydraulic means will effect raking action by said puller member.

3. In a device of the character described, a pair of spaced supports, a push arm pivotally connected to each of said supports, a bucket carried by said push arms, a puller member for pulling material into said bucket, arm means for actuating said pulling means, sleeve means adapted to receive said arm means said sleeve means being pivotally mounted relative to said push arms and hydraulic means connected to said push arms and said arm means for actuating said arm means and thereby actuate said pulling means, and means for controlling the movement of said arm means in said sleeve means and stop means for controlling the raising of said sleeve means relative to said push arms whereby movement of said arms by said hydraulic means will effect raking action by said puller member.

4. In a device of the character described, a pair of spaced supports, a push arm pivotally connected to each of said supports, a bucket carried by said push arms, a puller member for pulling material into said bucket, arm means for actuating said pulling means, sleeve means adapted to receive said arm means said sleeve means being pivotally mounted relative to said push arms and hydraulic means connected to said push arms and said arm means for actuating said arm means and thereby actuate said pulling means, and means for controlling the movement of said arm means in said sleeve means and stop means for controlling the raising of said sleeve means relative to said push arms, and means for controlling the movement of said arm means in said sleeve means, said means comprising friction means between said arm means and said sleeve means whereby movement of said arms by said hydraulic means will effect raking action by said puller member.

References Cited in the file of this patent UNITED STATES PATENTS 1,300,111 Billings Apr. 8, 1919 2,328,715 Drott Sept. 7, 1943 2,627,989 Chaves Feb. 10, 1953 2,638,235 Pokorny May 12, 1953 2,705,082 Heimsoth Mar. 29, 1955 

